An obligation is strictly personal when its performance can be enforced only by the obligee, or only against the obligor.
When the performance requires the special skill or qualification of the obligor, the obligation is presumed to be strictly personal on the part of the obligor. All obligations to perform personal services are presumed to be strictly personal on the part of the obligor.
When the performance is intended for the benefit of the obligee exclusively, the obligation is strictly personal on the part of that obligee.